"Revshop" on eBay (aka Ken Kontos, MidWest Firearms) is selling these offerings.
http://search.ebay.com/search/search...ron&category0=
Might do well to 'search' the term "revshop" on the LF search feature...
Another iron is offered on eBay here :
http://cgi.ebay.com/ws/eBayISAPI.dll...0%3D%26fvi%3D1